The author didn't explain "how the scammer was texting her". I don't own an iPhone. On my Android device, they'd have to have my phone number which I don't know how they'd get from the locked phone. Of course, I -- like many -- provide an alternate number on the screen for "helpful people who might want to return, rather than re-sell, my crappy old Samsung phone." And I'd imagine that would be the way to get "the first reply".
But if you could avoid that[0], it keeps you from feeding a likely gambling addiction, or at least makes the game a little less satisfying. Consider that they've got a box of bricked phones. Every text is a chance to turn one of those into a few hundred dollars. Every reply is a small "high" that they're still in the game. Every message that goes off into the Ether, ignored, is "additional confirmation that this phone is a permanent brick" and you don't even get the satisfaction of feeling like maybe you intimidated someone a little.
[0] And to a lesser extent, even if you can't. I've blocked scammmers and seen the progression of repeated "Hello?"s ... somewhere in there it's connected that whatever they're trying to send me is not meeting my eyeballs. Had a funny one that was like 30 messages in a row, followed by "whatever" and "ass hole" ... I remember thinking it was odd that it was always lower case and that they put a space between ass and hole. Not necessarily like a person with a lack of English language skills, but like a tween just learning how to wield profanity.